參數(shù)資料
型號: MB90474PF
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, QFP-100
文件頁數(shù): 96/118頁
文件大?。?/td> 1199K
代理商: MB90474PF
MB90470 Series
79
22. External Bus Pin Control Circuit
The external bus pin control circuit controls the external bus pins used to expand the CPU address/data bus
connections to external circuits.
(1) Register List
(2) Block Diagram
Auto ready function select register (ARSR)
External address output control register (HACR)
Bus control signal select register (EPCR)
Initial value
Address : 0000A5H
0011- - 00B
Initial value
Address : 0000A6H
00000000B
Initial value
Address : 0000A7H
1000
10 -B
W
*
: Write only
: Not used
: May be either “1” or “0”
WW
W
WW
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
ICR0
W
ICR1
HMR1
HMR0
LMR1
LMR0
W
WWW
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
E22
W
E23
E21
E20
E19
E18
E17
E16
WW
W
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
RYE
W
CKE
HDE
ICBS
HMBS
WRE
LMBS
P3
P2
P1
P0
P5
RB
P4
P5
Access control
Address control
Data control
P0 direction
P0 data
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參數(shù)描述
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